If you are in the market for a new bicycle with the purpose of using it to commute to work you may have heard of or seen a single speed bike. In London single speed bikes are everywhere in the form of old steel frame conversions, deep rim fashion fixies to dedicated track bikes. Here are some important questions you need to ask yourself before you make a decision. How far/short is my commute? Is my area hilly? What's my budget? Is there somewhere safe to lock my bike at work? Can I take my bike into the office? Do I want to take up cycling...